<?php
// $Id:$

/**
 * Implements hook_form().
 */
function save_draft_admin_form($form) {
  $form['save_draft_en_node_type'] = array(
    '#type' => 'checkbox',
    '#title' => 'Enable save draft per content type.',
    '#default_value' => variable_get('save_draft_en_node_type', 0),
  );
  
  if (variable_get('save_draft_en_node_type', 0)) {
    $def_type = variable_get('save_draft_node_types', '');
    $form['save_draft_node_types'] = array(
      '#type' => 'checkboxes',
      '#title' => 'Select content type',
      '#options' => _node_types(),
      '#default_value' => empty($def_type) ? array() : $def_type,
    );    
  }
  return system_settings_form($form);
}

/**
 * Returns array of node types.
 */
function _node_types() {
  $types = array();
  foreach (node_type_get_types() as $key => $val) {
    $types[$key] = $val->name;
  }
  return $types;
}